Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Confidence interval for mean using normal distribution.

A market research company surveys individuals to determine how much money they spend each year on clothing.  They sample 30 individuals and the sample mean is $1287 with a sample standard deviation of 632.

Required:
1.estimation the population expenditure on clothing with 95% confidence.
2. Estimate the population expenditure on clothing with 99% confidence.
3. describe the difference between your results in 1 and 2.

If the population mean was $1047 in the previous year, does the evidence suggest that expenditure this year has significantly changed?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922220

Have any Question? 


Related Questions in Statistics and Probability

Locate one article presenting research using polynomial

Locate one article presenting research using polynomial regression. Your task now is to critique the appropriateness, utility, alternatives, strengths, and weaknesses of the use of statistics to support the hypotheses of ...

A company has 100000 to invest in new rampd projects

A company has $1,00,000 to invest in new R&D projects.  The company wants to determine what set of projects should be selected.   The following table summarizes the initial cost and revenue potential for each of the proj ...

How did religion shape indian reaction to white settlement

How did religion shape Indian reaction to white settlement in the nineteenth century?

Starting in 1998 a series of credit card usage studies have

Starting in 1998, a series of credit card usage studies have been performed by Sallie Mae, a major provider of educational loans and savings programs. In a recent pilot study, a random pool of 122 loan applicants attendi ...

1 one factor in determining the shelf life of a dry cereal

1) One factor in determining the shelf life of a dry cereal is the moisture content.  Since standard packaging techniques do not completely prevent cereal from absorbing moisture, the longer it stays on the shelf, the mo ...

1 distinguish between theory model and hypothesis2 describe

1. Distinguish between theory, model, and hypothesis. 2. Describe how researchers use induction versus deduction to generate research hypotheses. 3. Describe the process by which hypotheses are developed and tested.

According to a study conducted by dell computers 65 of men

According to a study conducted by Dell Computers, 65% of men and 70% of women say that weight is a very important factor in purchasing a laptop computer. Suppose this survey was conducted using 374 men and 481 women. Do ...

Probabilities of graduation and publicationprofessors have

Probabilities of Graduation and Publication Professors have hundreds of students in their classes each year. Some professors teach only upper division courses to students who are in their major course of study. Of this g ...

In a clinical study of an allergy drug 103 of the 202

In a clinical study of an allergy drug, 103 of the 202 subjects reported experiencing significant relief from their symptoms. At the 0.05 significance level, test the claim that more than half of all those using the drug ...

Case study mikhail gorbachevs 1988 un speechif the pace of

Case Study: Mikhail Gorbachev's 1988 UN SpeechIf the pace of improving US-Soviet relations seemed rapid, Mikhail Gorbachev's speech to the United Nations General Assembly would shift the process into overdrive.  In this ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro